# 18: Confidence Interval Calculator for a Mean With Statistics (Sigma Unknown)

- Page ID
- 8345

CONFIDENCE INTERVAL Calculator WITH STATISTICS (Sigma unknown)

Fill in the sample size (n), the sample mean (\(\bar{x}\)), the sample standard deviation (s), and the confidence level (CL). Write the confidence level as a decimal. For example, for a 95% confidence level, enter 0.95 for CL. Then hit Calculate and assuming the population is normally distributed, the confidence interval will be calculated for you.

n: | \(\bar{x}\): | s: | CL: |

Lower Bound | Upper Bound |